Add git hash/tag to the about string

.vscode/tasks.json

@@ -4,7 +4,7 @@
     "version": "2.0.0",
     "tasks": [
         {
-            "label": "debug",
+            "label": "build",
             "type": "shell",
             "command": "build/build.sh",
             "problemMatcher": [],

build/build.sh

@@ -11,4 +11,6 @@ scriptdir=`pwd`
 
 cd ..
 
-go build
+git_tag=`git describe --exact-match HEAD 2>/dev/null`
+git_hash=`git log --pretty=format:'%h' -n 1`
+go build -ldflags "-X main.gitTag=$git_tag -X main.gitHash=$git_hash"

main.go

@@ -8,10 +8,21 @@ import (
 	"time"
 )
 
+var gitTag string
+var gitHash string
+
 var gotErrChan = make(chan bool)
 
 func getAboutStr() string {
-	return "kappanhang by Norbert Varga HA2NON and Akos Marton ES1AKOS https://github.com/nonoo/kappanhang"
+	var v string
+	if gitTag != "" {
+		v = gitTag
+	} else if gitHash != "" {
+		v = gitTag
+	} else {
+		v = "debug"
+	}
+	return "kappanhang " + v + " by Norbert Varga HA2NON and Akos Marton ES1AKOS https://github.com/nonoo/kappanhang"
 }
 
 func runControlStream(osSignal chan os.Signal) (shouldExit bool, exitCode int) {